1 : impossible to doubt or dispute; "indisputable (or sure) proof"
2 : reliable in operation or effect; "a quick and certain remedy"; "a sure way to distinguish the two"; "wood dust is a sure sign of termites"
3 : financially safe; "a good investment"; "a secure investment"
4 : worthy of being depended on; "a dependable worker"; "an honest working stiff"; "a reliable source of information"; "he was true to his word"; "I would be true for there are those who trust me"
adjectif
1 : established beyond doubt or question; definitely known
